((2R,6R,8S)-4-ethyl-1,3,6,7,8,9-hexahyro- 8-(methoxycarbonyl)-2,6-methano- 2H-azecino(4,3-b)indol-8-yl)-3-hydroxy- 16-methoxy-1-methyl-,methyl ester, (2beta,3beta,4beta,5alpha,12R,19alpha)- aspidospermidine-3-carboxylic acid